Specified PeopleCode program does not exist

Hello,

I apologize first if this appears to be a stupid question, but I am stumped.  I have never taken a PeopleCode class, so I am self taught and never encountered this before.

We are running Tools 8.50.18 and I am trying to Declare a Function in some existing PeopleCode.  In JOB.COMPRATE FieldFunction, I have this code:

Function check_action_and_reason(&ROW1);
   /* logic here */;
End-Function;

In JOB.COMPRATE FieldChange I have this code:

Declare Function check_action_and_reason PeopleCode JOB.COMPRATE FieldFormula;

When I Check Syntax or try to save, I get the Application Designer error box stating that "Specifed PeopleCode program does not exist" (see attachment)